Separable attachment-plug.



J. G. PETERSON. y .gEfARABLE ATTACHMENT PLUG. APPLIQATION FILED MAR; 31,1913` mente@ Apr. 14, 19m] sively made rable at SEPALRABLE ATTACHMENT-PLUG.

Specification of Letters Patent.

ratentea apr. ii, ieri.

Application filed March 31, 1918. Serial No. 758,013.

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Be it known that I, JOHANN G. PETERSON, a citizen of the United States, residing at Jersey City, in the county of Hudson and .State oit N ew Jersey, have invented certain new and useful Improvements in Separable Attachinentsllugs, of which the following is a specification.

'his invention relates to separable attachnient plugs, among the principal objects of the invention being the provision of an ar ticle of this character which is simple in con struction, which can be readily and inexpenandwherein the parts of the loody are rigidly and substantially held in proper position.`

In the drawings accompanying and forining part .of the present specification, I have shown in detail one of the several convenient forms of embodiment of the invention, which to enable those skilled in the art to practise the same will be set forth fully in the following description. I do not restrict myself to this disclosure; I may depart therefrom Vin several respects within the ,cope ot the invention delincd by the claim elle fr said description.

vez-tif.` l sectional view of the body of a sepauiieiit plug, involving my invention. Fig. 2 is an elevation of the removable or cap member of the device. Fig. 3 is a 'vertical section on the line 3-3 of F ig. 1. W' a. top plan view of the plug, and, t is perspective view of azspringnger. iii lie ch araclers refer to like parts throughout the several figures.

The plug comprises in its make-up a` body as 2 and a separable member or cap as 3. The body in turn consists of a base such as that denoted in a general way by 4, and a zact shell 5, the base 4f, as illustrated compi ising the main section (l and the auxiliary s 'on 7 both of insulating material such for inhale as porcelain or any of the compositions now employed in the manufacture of attnclnnent plugs. lhe two sections 6 and 7 are connected together in any desirable man ner, the screw d being shown for this purand extending through 'registering bores in the we Licctions 6 and 7 and having a threaded ounectien with the wall of the here in th section 7. The head of the screw .ti ngel :t the bottom of a counterhore 9 in 'which said head is situated and which leads erally reducing said section G.

. ring to said drawings: Figure 1 is a foot 20. of the finger or spring 17. or section fz from the aperture l() in the top of the section 6. The contact shell surrounds the section 1 and its outer edge bears against a circumferential shoulder 11 on said section 6, which is conveniently formed by periph- 'll-he contact shell 5 has at its lower end the flange or bottom 12 clamped between the sections 6 and 7 and slotted, however, to provide for the passage of Athe upward project-ing portions of the section 7. Said flange 12 fits a rabbet or groove 12 in the section 7 to thus aid in holding said contact shell in place.

As will be understood the shell 5 tutes a lateral contact for oo eration with a 7o contact in a socket. The en( contact of the plug is designated by 13 being located approximately vcentrally of the lower end of the base et and having a substantially central opening threaded for engagement with the threads of the connecting screw 8. The central or end contact or disk 13 has an approximately L-shaped extensonleldisposed in a notch 15 in said section 7, the outer branch of said extension 14 resting against 80 the'top of said notch or slot 15. Owing to the fact that said extension lits comparatively closely in said slot lateral motion of said extension is prevented, and it also follo-ws that rotation of the central contact or disk 13 cannot occur.

There are two spring fingers as 16 and 17 situated in longitudinally extending passages 18 and 19 in the section 6. The spring fingers 16 and 17 have outwardly extending bases or feet 20 provided with laterally disposed lugs or ears 21 litted in recesses or' seats 22 in the section 6 near the lower ends of the passages 18 and 19, the lugs or ears 21 being firmly held in the recesses or seats 22 95 by the section 7; in other words the bases or feet 2U are clamped substantially between the sections of the base, thereby taking oil" some of the strain from the screws 23 and 24. The screw 23 extends through the flange 12 100 of the Contact shell and is tapped into the foot or case of the spring 16, thus electrically connecting said linger or spring 1,6 with the contact shell 5. The screw 21 connectsthe extensionl with the finger or spring, 17, said scrcv..A :Pl being tapped into the base or The cap is provided with similar fingers or springs 25 attached thereto in any desirable mannerand adapted to be connected consti- Cil with the wires of the cord 26. The separable cap or section 3 and its adjuncts are not uncommon and are not in themselves novel with me, for which 4reason the)7 are not described further in detail.

What I claim is: Y

An attachment plug comprising an insulating base having mainand auxiliary seetions, a threaded Contact shell surrounding the main section, having a flange at its bottom clamped between the sections of the' base, contact fingers in the base having outwardly `extending feet provided with laterally disposed lngis also claniped between said sections, the main section being'chambered 15 to receive said contact fingers, and an end Contact electrically connected with one of said fingers, the other linger being electr- JOHANN G. PETERsoNt Witnesses:

HERMAN T. HARTWIG, ALICE LAWSON.

my signature 20 

